Hmmm... who do you want to conquer next? Second Republik of Poland had a very good relationships with Romania and Hungary, relationships with Latvia and Estonia were good too. Jugoslavia was friendly too. We had bad relations with Lithuania (because Wilno/Vilnus). So you going to attack friendly country or rather hostile one? Maybe Italy is your next target?
I counted population of your country and their ethnic composition
Before 2WW Poland had population 34.8 million:
# Poles – 65,5%. = 23 million
# Ukrainians – 16%. = 5.6 million
# Jews – 9,4%. = 3.3 million
# Bielarussians – 5,5%. = 1.9 million
# Germans – 2,6%. = 0.9 million
Czechoslovakia had population about 15.3 millions
# Czechs: 50% = 6.6 million
# Germans: 24% = 3.2 million
# Slovakians: 18% = 2 million
0.7 million Hungarians
0.5 million Rusyns
0.3 million Jews
0.1 million Poles
Germany had 69.3 million people - mostly Germans
so your emire has now population about 120 million, and:
about 60% of them are Germans
19% Poles
5,5% Czechs
4,5% Ukrainians
1,5% Slovaks
1,5% Belarussians
3% Jews
this is very dangerous situation for your country - too many Germans
think about
Maybe it is time for creation of federal country - Slav (edit: without e
) Union and give autonomy to all Slav Brothers (Ukrainians and Belarusians too) -> (add cores in Czechoslovakia and some parts of USRR). You can diploannex Jugoslavia too